Analog Input Compensation - Mitsubishi Electric FR-A800 Series Instruction Manual

—: No function
*1 This function is valid under Vector control.
*2 Invalid when Pr.868 = "1".
*3 Invalid when Pr.868 = "4".
NOTE
• When Pr.868 = "1" (magnetic flux command) or "4" (stall prevention / torque limit), the terminal 4 function is enabled regardless
of the ON/OFF state of the AU signal.
Parameters referred to
Advanced magnetic flux vector
Real sensorless vector
Pr.804 Torque command source
Pr.807 Speed limit
Pr.810 Torque limit input method
Pr.840 Torque bias

5.12.3 Analog input compensation

The analog input for multi-speed operation or speed setting (main speed) through terminal 2 or 4 can be compensated by
adding an input, or terminal 2 can be used for an auxiliary input to compensate the analog input at a fixed ratio using the
override function.
Pr.
73
Analog input selection
T000
Terminal 1 added
242
compensation amount
T021
(terminal 2)
Terminal 1 added
243
compensation amount
T041
(terminal 4)
252
Override bias
T050
253
Override gain
T051
 Compensation by addition (Pr.242, Pr.243)
Auxiliary input
0 to 10V( 5V)
Example of addition compensation connection
• A compensation signal can be added to the main speed setting for such as synchronous or continuous speed control
operation.
• Set "0 to 3, 6, 7, 10 to 13, 16, or 17" in Pr.73 to add the voltage determined by the terminal 1 input when the main speed
setting is input through terminal 2.
• When a negative voltage obtained from the addition, it is regarded as 0 and the operation is stopped when Pr.73 = "0 to
3, 6, or 7", and the operation is reversed (polarity reversible operation) after the STF signal is turned ON when Pr.73 = "10
to 13, 16, or 17".
• The terminal 1 compensation input can be added to the multi-speed setting or terminal 4 (initial value: 4 to 20 mA).
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Name Initial value
1
100%
75%
50%
150%
Forward
Inverter
rotation
STF
SD
10
2
5
1
search engine
Setting range
0 to 3, 6, 7, 10 to 13, 16, 17 Compensation by addition
4, 5, 14, 15 Compensation using the override function
Set the percentage of addition when terminal 2
0 to 100%
is used to set the main speed.
Set the percentage of addition when terminal 4
0 to 100%
is used to set the main speed.
Set bias compensation for the override
0 to 200%
function.
Set gain compensation for the override
0 to 200%
function.
5.12 (T) Multi-function input terminal parameters
Description
501
5. PARAMETERS
1
2
3
4
5
6
7
8
9
10